Noun
An
agreement
whereby
an
airline
buys
space
on
another
airline
and
markets
the
extra
space
as
its
own
.
Often
used
to
increase
a
route
network
without
the
costs
of
running
a
full
service
.
Verb
To
buy
space
on
(
a
flight
)
in
this
way
.